1. What is the meaning of rotate?
move or
cause to move in a circle around an axis or center
2. What is the meaning of revolve?
move in a circle on a central axis
3. what is the equinox

the time or date twice each year at which the sun crosses the celestial equator, when day and night are of equal length about September 22 and March 20
4. What is the solstice?
either of the two times in the year, the summer solstice and the winter solstice, when the sun reaches its highest or lowest point in the sky at noon marked by the longest and shortest days
5. What is the North Pole?
The north pole is the northernmost point on the Earth, lying diametrically opposite the South pole It defines geodetic latitude 90° north, as well as the direction of true north
6. What is the South Pole?
either of the to locations North Pole or South Pole on the surface of earth or of a celestial object that are the northern and southern ends of the axis of rotation.
7.What is an Earth day?
earth day is an annual event, celebrated on April 22, on which day events worldwide are held to demonstrate support for environmental protection. It was first celebrated in 1970, and is now coordinated globally by the earth day Network and celebrated in more than 193 countries each year.
8.What is an Earth year?
its 365 days
9.What is an axis?
an imaginary line about which a body rotates